Annotation of sys/dev/i2c/w83l784r.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: w83l784r.c,v 1.12 2007/06/24 05:34:35 dlg Exp $ */
2:
3: /*
4: * Copyright (c) 2006 Mark Kettenis
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/param.h>
20: #include <sys/systm.h>
21: #include <sys/device.h>
22: #include <sys/sensors.h>
23:
24: #include <dev/i2c/i2cvar.h>
25:
26: /* W83L784R registers */
27: #define W83L784R_VCORE 0x20
28: #define W83L784R_VBAT 0x21
29: #define W83L784R_3_3V 0x22
30: #define W83L784R_VCC 0x23
31: #define W83L784R_TEMP1 0x27
32: #define W83L784R_FAN1 0x28
33: #define W83L784R_FAN2 0x29
34: #define W83L784R_CONFIG 0x40
35: #define W83L784R_FANDIV 0x49
36: #define W83L784R_T23ADDR 0x4b
37: #define W83L784R_CHIPID 0x4e
38:
39: #define W83L784R_TEMP23 0x00
40:
41: /* W83L785R registers */
42: #define W83L785R_2_5V 0x21
43: #define W83L785R_1_5V 0x22
44: #define W83L785R_VCC 0x23
45: #define W83L785R_TEMP2 0x26
46: #define W83L785R_FANDIV 0x47
47:
48: /* Chip IDs */
49: #define WBENV_CHIPID_W83L784R 0x50
50: #define WBENV_CHIPID_W83L785R 0x60
51: #define WBENV_CHIPID_W83L785TS_L 0x70
52:
53: #define WBENV_MAX_SENSORS 9
54:
55: /*
56: * The W83L784R/W83L785R can measure voltages up to 4.096/2.048 V.
57: * To measure higher voltages the input is attenuated with (external)
58: * resistors. So we have to convert the sensor values back to real
59: * voltages by applying the appropriate resistor factor.
60: */
61: #define RFACT_NONE 10000
62: #define RFACT(x, y) (RFACT_NONE * ((x) + (y)) / (y))
63:
64: struct wbenv_softc;
65:
66: struct wbenv_sensor {
67: char *desc;
68: enum sensor_type type;
69: u_int8_t reg;
70: void (*refresh)(struct wbenv_softc *, int);
71: int rfact;
72: };
73:
74: struct wbenv_softc {
75: struct device sc_dev;
76:
77: i2c_tag_t sc_tag;
78: i2c_addr_t sc_addr[3];
79: u_int8_t sc_chip_id;
80:
81: struct ksensor sc_sensors[WBENV_MAX_SENSORS];
82: struct ksensordev sc_sensordev;
83: struct wbenv_sensor *sc_wbenv_sensors;
84: int sc_numsensors;
85: };
86:
87: int wbenv_match(struct device *, void *, void *);
88: void wbenv_attach(struct device *, struct device *, void *);
89:
90: void wbenv_setup_sensors(struct wbenv_softc *, struct wbenv_sensor *);
91: void wbenv_refresh(void *);
92:
93: void w83l784r_refresh_volt(struct wbenv_softc *, int);
94: void w83l785r_refresh_volt(struct wbenv_softc *, int);
95: void wbenv_refresh_temp(struct wbenv_softc *, int);
96: void w83l784r_refresh_temp(struct wbenv_softc *, int);
97: void w83l784r_refresh_fanrpm(struct wbenv_softc *, int);
98: void w83l785r_refresh_fanrpm(struct wbenv_softc *, int);
99:
100: u_int8_t wbenv_readreg(struct wbenv_softc *, u_int8_t);
101: void wbenv_writereg(struct wbenv_softc *, u_int8_t, u_int8_t);
102:
103: struct cfattach wbenv_ca = {
104: sizeof(struct wbenv_softc), wbenv_match, wbenv_attach
105: };
106:
107: struct cfdriver wbenv_cd = {
108: NULL, "wbenv", DV_DULL
109: };
110:
111: struct wbenv_sensor w83l784r_sensors[] =
112: {
113: { "VCore", SENSOR_VOLTS_DC, W83L784R_VCORE, w83l784r_refresh_volt, RFACT_NONE },
114: { "VBAT", SENSOR_VOLTS_DC, W83L784R_VBAT, w83l784r_refresh_volt, RFACT(232, 99) },
115: { "+3.3V", SENSOR_VOLTS_DC, W83L784R_3_3V, w83l784r_refresh_volt, RFACT_NONE },
116: { "+5V", SENSOR_VOLTS_DC, W83L784R_VCC, w83l784r_refresh_volt, RFACT(50, 34) },
117: { "", SENSOR_TEMP, W83L784R_TEMP1, wbenv_refresh_temp },
118: { "", SENSOR_TEMP, 1, w83l784r_refresh_temp },
119: { "", SENSOR_TEMP, 2, w83l784r_refresh_temp },
120: { "", SENSOR_FANRPM, W83L784R_FAN1, w83l784r_refresh_fanrpm },
121: { "", SENSOR_FANRPM, W83L784R_FAN2, w83l784r_refresh_fanrpm },
122:
123: { NULL }
124: };
125:
126: struct wbenv_sensor w83l785r_sensors[] =
127: {
128: { "VCore", SENSOR_VOLTS_DC, W83L784R_VCORE, w83l785r_refresh_volt, RFACT_NONE },
129: { "+2.5V", SENSOR_VOLTS_DC, W83L785R_2_5V, w83l785r_refresh_volt, RFACT(100, 100) },
130: { "+1.5V", SENSOR_VOLTS_DC, W83L785R_1_5V, w83l785r_refresh_volt, RFACT_NONE },
131: { "+3.3V", SENSOR_VOLTS_DC, W83L785R_VCC, w83l785r_refresh_volt, RFACT(20, 40) },
132: { "", SENSOR_TEMP, W83L784R_TEMP1, wbenv_refresh_temp },
133: { "", SENSOR_TEMP, W83L785R_TEMP2, wbenv_refresh_temp },
134: { "", SENSOR_FANRPM, W83L784R_FAN1, w83l785r_refresh_fanrpm },
135: { "", SENSOR_FANRPM, W83L784R_FAN2, w83l785r_refresh_fanrpm },
136:
137: { NULL }
138: };
139:
140: struct wbenv_sensor w83l785ts_l_sensors[] =
141: {
142: { "", SENSOR_TEMP, W83L784R_TEMP1, wbenv_refresh_temp },
143:
144: { NULL }
145: };
146:
147: int
148: wbenv_match(struct device *parent, void *match, void *aux)
149: {
150: struct i2c_attach_args *ia = aux;
151:
152: if (strcmp(ia->ia_name, "w83l784r") == 0 ||
153: strcmp(ia->ia_name, "w83l785r") == 0 ||
154: strcmp(ia->ia_name, "w83l785ts-l") == 0)
155: return (1);
156: return (0);
157: }
158:
159: void
160: wbenv_attach(struct device *parent, struct device *self, void *aux)
161: {
162: struct wbenv_softc *sc = (struct wbenv_softc *)self;
163: struct i2c_attach_args *ia = aux;
164: u_int8_t cmd, data, config;
165: int i;
166:
167: sc->sc_tag = ia->ia_tag;
168: sc->sc_addr[0] = ia->ia_addr;
169:
170: iic_acquire_bus(sc->sc_tag, 0);
171:
172: cmd = W83L784R_CHIPID;
173: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
174: sc->sc_addr[0], &cmd, sizeof cmd, &data, sizeof data, 0)) {
175: iic_release_bus(sc->sc_tag, 0);
176: printf(": cannot read chip ID register\n");
177: return;
178: }
179:
180: iic_release_bus(sc->sc_tag, 0);
181:
182: sc->sc_chip_id = data;
183:
184: switch (sc->sc_chip_id) {
185: case WBENV_CHIPID_W83L784R:
186: printf(": W83L784R\n");
187: wbenv_setup_sensors(sc, w83l784r_sensors);
188: break;
189: case WBENV_CHIPID_W83L785R:
190: printf(": W83L785R\n");
191: wbenv_setup_sensors(sc, w83l785r_sensors);
192: goto start;
193: case WBENV_CHIPID_W83L785TS_L:
194: printf(": W83L785TS-L\n");
195: wbenv_setup_sensors(sc, w83l785ts_l_sensors);
196: goto start;
197: default:
198: printf(": unknown Winbond chip (ID 0x%x)\n", sc->sc_chip_id);
199: return;
200: }
201:
202: iic_acquire_bus(sc->sc_tag, 0);
203:
204: cmd = W83L784R_T23ADDR;
205: if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
206: sc->sc_addr[0], &cmd, sizeof cmd, &data, sizeof data, 0)) {
207: iic_release_bus(sc->sc_tag, 0);
208: printf(": cannot read address register\n");
209: return;
210: }
211:
212: iic_release_bus(sc->sc_tag, 0);
213:
214: sc->sc_addr[1] = 0x48 + (data & 0x7);
215: sc->sc_addr[2] = 0x48 + ((data >> 4) & 0x7);
216:
217: /* Make the bus scan ignore the satellites. */
218: iic_ignore_addr(sc->sc_addr[1]);
219: iic_ignore_addr(sc->sc_addr[2]);
220:
221: start:
222: if (sensor_task_register(sc, wbenv_refresh, 5) == NULL) {
223: printf("%s: unable to register update task\n",
224: sc->sc_dev.dv_xname);
225: return;
226: }
227:
228: /* Start the monitoring loop */
229: config = wbenv_readreg(sc, W83L784R_CONFIG);
230: wbenv_writereg(sc, W83L784R_CONFIG, config | 0x01);
231:
232: /* Add sensors */
233: for (i = 0; i < sc->sc_numsensors; ++i)
234: sensor_attach(&sc->sc_sensordev, &sc->sc_sensors[i]);
235: sensordev_install(&sc->sc_sensordev);
236: }
237:
238: void
239: wbenv_setup_sensors(struct wbenv_softc *sc, struct wbenv_sensor *sensors)
240: {
241: int i;
242:
243: strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
244: sizeof(sc->sc_sensordev.xname));
245:
246: for (i = 0; sensors[i].desc; i++) {
247: sc->sc_sensors[i].type = sensors[i].type;
248: strlcpy(sc->sc_sensors[i].desc, sensors[i].desc,
249: sizeof(sc->sc_sensors[i].desc));
250: sc->sc_numsensors++;
251: }
252: sc->sc_wbenv_sensors = sensors;
253: }
254:
255: void
256: wbenv_refresh(void *arg)
257: {
258: struct wbenv_softc *sc = arg;
259: int i;
260:
261: iic_acquire_bus(sc->sc_tag, 0);
262:
263: for (i = 0; i < sc->sc_numsensors; i++)
264: sc->sc_wbenv_sensors[i].refresh(sc, i);
265:
266: iic_release_bus(sc->sc_tag, 0);
267: }
268:
269: void
270: w83l784r_refresh_volt(struct wbenv_softc *sc, int n)
271: {
272: struct ksensor *sensor = &sc->sc_sensors[n];
273: int data, reg = sc->sc_wbenv_sensors[n].reg;
274:
275: data = wbenv_readreg(sc, reg);
276: sensor->value = (data << 4); /* 16 mV LSB */
277: sensor->value *= sc->sc_wbenv_sensors[n].rfact;
278: sensor->value /= 10;
279: }
280:
281: void
282: w83l785r_refresh_volt(struct wbenv_softc *sc, int n)
283: {
284: struct ksensor *sensor = &sc->sc_sensors[n];
285: int data, reg = sc->sc_wbenv_sensors[n].reg;
286:
287: data = wbenv_readreg(sc, reg);
288: sensor->value = (data << 3); /* 8 mV LSB */
289: sensor->value *= sc->sc_wbenv_sensors[n].rfact;
290: sensor->value /= 10;
291: }
292:
293: void
294: wbenv_refresh_temp(struct wbenv_softc *sc, int n)
295: {
296: struct ksensor *sensor = &sc->sc_sensors[n];
297: int sdata;
298:
299: sdata = wbenv_readreg(sc, sc->sc_wbenv_sensors[n].reg);
300: if (sdata & 0x80)
301: sdata -= 0x100;
302: sensor->value = sdata * 1000000 + 273150000;
303: }
304:
305: void
306: w83l784r_refresh_temp(struct wbenv_softc *sc, int n)
307: {
308: struct ksensor *sensor = &sc->sc_sensors[n];
309: int16_t sdata;
310: u_int8_t cmd = 0;
311:
312: iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
313: sc->sc_addr[sc->sc_wbenv_sensors[n].reg],
314: &cmd, sizeof cmd, &sdata, sizeof sdata, 0);
315: sensor->value = (sdata >> 7) * 500000 + 273150000;
316: }
317:
318: void
319: w83l784r_refresh_fanrpm(struct wbenv_softc *sc, int n)
320: {
321: struct ksensor *sensor = &sc->sc_sensors[n];
322: int data, divisor;
323:
324: data = wbenv_readreg(sc, W83L784R_FANDIV);
325: if (sc->sc_wbenv_sensors[n].reg == W83L784R_FAN1)
326: divisor = data & 0x07;
327: else
328: divisor = (data >> 4) & 0x07;
329:
330: data = wbenv_readreg(sc, sc->sc_wbenv_sensors[n].reg);
331: if (data == 0xff || data == 0x00) {
332: sensor->flags |= SENSOR_FINVALID;
333: sensor->value = 0;
334: } else {
335: sensor->flags &= ~SENSOR_FINVALID;
336: sensor->value = 1350000 / (data << divisor);
337: }
338: }
339:
340: void
341: w83l785r_refresh_fanrpm(struct wbenv_softc *sc, int n)
342: {
343: struct ksensor *sensor = &sc->sc_sensors[n];
344: int data, divisor;
345:
346: data = wbenv_readreg(sc, W83L785R_FANDIV);
347: if (sc->sc_wbenv_sensors[n].reg == W83L784R_FAN1)
348: divisor = data & 0x07;
349: else
350: divisor = (data >> 4) & 0x07;
351:
352: data = wbenv_readreg(sc, sc->sc_wbenv_sensors[n].reg);
353: if (data == 0xff || data == 0x00) {
354: sensor->flags |= SENSOR_FINVALID;
355: sensor->value = 0;
356: } else {
357: sensor->flags &= ~SENSOR_FINVALID;
358: sensor->value = 1350000 / (data << divisor);
359: }
360: }
361:
362: u_int8_t
363: wbenv_readreg(struct wbenv_softc *sc, u_int8_t reg)
364: {
365: u_int8_t data;
366:
367: iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
368: sc->sc_addr[0], ®, sizeof reg, &data, sizeof data, 0);
369:
370: return data;
371: }
372:
373: void
374: wbenv_writereg(struct wbenv_softc *sc, u_int8_t reg, u_int8_t data)
375: {
376: iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
377: sc->sc_addr[0], ®, sizeof reg, &data, sizeof data, 0);
378: }
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